In this case, you first need to think about what is the formula for the circumference of a circle. <span>The formula for the circumference of a circle is 2 * PI * r, where r is the radius of the circle, and PI is the mathematical constant approximately equal to 3.14.

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I hope my explanation helps
Proportional because it's a straight line if you follow the graph points and it goes by 5
Answer: x=26
Step-by-step explanation: